Nitpicky...

The words that Agatha had spoken to her in a careless and easy manner were the kind that was causing her to sink into the abyss of deep thinking. Elizabeth could not fathom how her visit to the sickly woman whose health had become of utmost priority to her, could in fact put her in far greater harm. What was Agatha trying to say to her with her indirect speech or riddles? Lizzie needed to find that out. 

Without stealing even a quick second to blink her eyes, she stamped her curious gaze on the one whose words just now had had this much impact on her mood. 

Agatha smirked and laughed lightly.